[issue25510] fileinput.FileInput.readline() always returns str object at the end even if in 'rb' mode

[Ryosuke Ito]

Changes by Ryosuke Ito <rito.0305 at gmail.com>:


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components: +Library (Lib)
versions: +Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25510>
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